1 #include "AliHMPIDTracker.h" //class header
2 #include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack()
3 #include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack()
4 #include "AliHMPIDRecon.h" //PropagateBack()
5 #include <AliESD.h> //PropagateBack()
6 #include <AliRun.h> //GetTrackPoint(),PropagateBack()
7 #include <AliTrackPointArray.h> //GetTrackPoint()
8 #include <AliAlignObj.h> //GetTrackPoint()
9 #include <AliCDBManager.h>
10 #include <AliCDBEntry.h>
12 // HMPID base class fo tracking
16 ClassImp(AliHMPIDTracker)
17 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
18 AliHMPIDTracker::AliHMPIDTracker():AliTracker()
21 fClu=new TObjArray(AliHMPIDDigit::kMaxCh+1);
22 fClu->SetOwner(kTRUE);
23 for(int i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
25 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
26 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
28 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
29 // MIP cluster is reffered by index which is stored in AliESDtrack ???????
30 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
31 // point- reference to the object where to store the point
32 // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
33 if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
34 Int_t iCham=idx/1000000;
35 Int_t iClu=idx%1000000;
36 point.SetVolumeID(AliAlignObj::LayerToVolUID(AliAlignObj::kHMPID,iCham-1));//layer and chamber number
37 TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
38 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
40 AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars);
41 point.SetXYZ(mars[0],mars[1],mars[2]);
44 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
45 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
47 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control
48 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
49 // Returns: error code (currently ignored in AliReconstruction::RunTraking())
51 for(int i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
52 pCluTree->GetEntry(0);
56 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
57 Int_t AliHMPIDTracker::PropagateBack(AliESD *pEsd)
59 // This method defined as pure virtual in AliTracker. It is invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters()
60 // Agruments: pEsd - pointer to ESD
61 // Returns: error code
62 AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 21 TF1
63 AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 7 TF1
64 if(!pNmeanEnt) AliFatal("No Nmean C6F14 ");
65 if(!pQthreEnt) AliFatal("No Qthre");
67 return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject());
69 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
70 Int_t AliHMPIDTracker::Recon(AliESD *pEsd,TObjArray *pCluAll,TObjArray *pNmean)
72 // Interface callback method invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event
73 // Arguments: pEsd - pointer to Event Summary Data class instance which contains a list of tracks
74 // Returns: error code, 0 if no errors
75 Int_t iNtracks=pEsd->GetNumberOfTracks(); AliDebugClass(1,Form("Start with %i tracks",iNtracks));
77 AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor
79 for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){ //ESD tracks loop
80 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get next reconstructed track
81 Int_t cham=IntTrkCha(pTrk,xPc,yPc); //get chamber intersected by this track
82 if(cham<0) continue; //no intersection at all, go after next track
83 Double_t nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
84 recon.SetImpPC(xPc,yPc); //store track impact to PC
85 recon.CkovAngle(pTrk,(TClonesArray *)pCluAll->At(cham),nmean); //search for Cerenkov angle of this track
87 AliDebugClass(1,"Stop pattern recognition");
88 return 0; // error code: 0=no error;
90 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
91 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Double_t &xToPc,Double_t &yToPc)
93 // Static method to find intersection in between given track and HMPID chambers
94 // Arguments: pTrk - ESD track
95 // xPc,yPc - track intersection with PC, LORS
96 // Returns: intersected chamber ID or -1
98 AliHMPIDParam *pParam=AliHMPIDParam::Instance();
99 Float_t xRa=0,yRa=0,xPc=0,yPc=0,theta=0,phi=0; //track intersection point and angles, LORS
100 for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++){ //chambers loop
101 Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliHMPIDParam::kRad); //point & norm for RAD
102 Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliHMPIDParam::kPc); //point & norm for PC
104 if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator
105 if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC
107 pParam->Mars2LorsVec(i,n1,theta,phi); //track angles at RAD
108 pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position
109 pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position
110 xToPc=(Double_t)xPc;yToPc=(Double_t)yPc; //conversion float->double only
111 if(AliHMPIDDigit::IsInside(xPc,yPc,pParam->DistCut())==kFALSE) continue; //not in active area
112 pTrk->SetHMPIDtrk (xRa,yRa,theta,phi); //store track intersection info
113 pTrk->SetHMPIDcluIdx (i,0);
116 return -1; //no intersection with HMPID chambers